.container{
    width: 100%;
    overflow: hidden;
    margin: auto;
}
.container canvas {
    width: 100% !important;
    margin: auto;
}
.pdf-header{
    position: -webkit-sticky;
    position: sticky;
    left: 0;
    top: 0;
    width: 100%;
    height: 50px;
    line-height: 50px;
    padding-right: 20px;
    background-color: rgba(0, 0, 0, .8);
}
.pdf-header div{
    color: #fff;
    float: right;
    font-size: 25px;
    user-select: none;
}
.scale{
    width: 100px;
    text-align: center;
}

.ppt-header{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 80px;
    padding-right: 20px;
    z-index: 999999;
    background-color: #000;
}